Chapter-12
Programming Of Digital Electrical Energy Meters.
Here Programming does not mean to design a programming language. Instead
programming means configure the digital energy meter, by loading or writing the energy
meter with some software. Different energy meter have dedicated software.
The programming of the energy meter is carried out via optical data cable connected
to a computer (on which software can be saved from manufacturers supplied disk). Other end
of the optical data cable has a magnetic optical interface head which is magnetically attached
to optical interface port on the face of the digital energy meter for communication with the
energy meter, i.e. to write or read the digital energy meter
The programming is intended for following purpose:
1.
To configure the energy meter for parameterization of various devices through unified
user interface.
2.
Configure different control readings for data storage / data display.
3.
Configure for different communication protocols and media.
4.
Real time clock and calendar setting i.e. date and time setting.
The some of the most commonly used software are given as follows:
a- ProWin for “CEWE” Energy Meter.
b- Winercom for “PRI-APEX” Energy Meter.
c- Meterview 4.9 for “ISKRA” Energy Meter.
12-1
a.
CEWE ProMeter reading software.
1.
ProWin:
Software for local or remote configuring and reading the
registers in the ProMeter.
2.
Proread:
Simple software for reading the data storage memory (data
logging feature of the ProMeter xx 43). Complements the
ProWin.
3.
EnerBase:
Software for automatic schedule meter reading and SQL
database management.
1.
To configure the energy meter for parameterization of various devices
through unified user interface.
Following is the list of few parameters with address for the ISKRA MT-860
digital energy meter.
12-2
Device Parameters scheme for ISKRA MT-860-1037.
Conventions:
A+ Active energy import.
A-
Active energy export.
Q+ Reactive energy import.
Q-
Sequences
Reactive energy export.
Sr.No. Address
Description
Auto Scroll Sequence.
1.
1-0: 0.4.3
Voltage ratio {prim / sec}
2.
1-0: 0.4.2
Current ratio {prim / sec}
3.
1-0:1.8.0
A+ all phases active Energy, Total
4.
1-0:1.8.0
A+ all phases active Energy, Total, PV
5.
1-0:2.8.0
A- all phases active Energy, Total
6.
1-0:2.8.0
A- all phases active Energy, Total, PV
7.
1-0:3.8.0
Q+ all phases active Energy, Total
8.
1-0:3.8.0
Q+ all phases active Energy, Total, PV
9.
1-0:4.8.0
Q- all phases active Energy,Total
10.
1-0:4.8.0
Q- all phases active Energy, Total, PV
11.
1-0:15.7.0
Active Q1+Q4+ Q2+Q3 all phases Instantaneous value, Total
12.
1-0:130.7.0
Reactive Q1+Q4+ Q2+Q3 all phases Instantaneous value,
Total
13.
1-0:13.7.0
Power factor all phases Instantaneous Value, Total
14.
1-0:14.7.0
Frequency all phases Instantaneous Value, Total
15.
1-0:31.7.0
Current phase R Instantaneous Value, Total
16.
1-0:51.7.0
Current phase S Instantaneous Value, Total
17.
1-0:71.7.0
Current phase T Instantaneous Value, Total
18.
1-0:32.7.0
Voltage phase R Instantaneous Value, Total
19.
1-0:52.7.0
Voltage phase S Instantaneous Value, Total
20.
1-0:72.7.0
Voltage phase T Instantaneous Value, Total
12-3
21.
1-0:1.6.0
A+ All phases Max.demand, Total
22.
1-0:1.6.0
A+ All phases Max.demand, Total, PV
23.
1-0:1.2.0
A+ All phases Comulative.demand, Total
24.
1-0:2.6.0
A- All phases Max.demand, Total
25.
1-0:2.6.0
A-All phases Max.demand, Total, PV
26.
1-0:2.2.0
A- All phases Comulative.demand, Total
27.
1-0:3.6.0
Q+ All phases Max.demand, Total
28.
1-0:3.6.0
Q+ All phases Max.demand, Total, PV
29.
1-0:3.2.0
Q+ All phases Comulative.demand, Total
30.
1-0:4.6.0
Q- All phases Max.demand, Total
31.
1-0:4.6.0
Q-All phases Max.demand, Total, PV
32.
1-0:4.2.0
Q- All phases Comulative.demand, Total
33.
1-0:0.1.0
MD reset count
Manual Scroll Sequence.
1.
1-0: 0.4.2
Current ratio {prim / sec}
2.
1-0: 0.4.3
Voltage ratio {prim / sec}
3.
1-0:1.8.0
A+ all phases active Energy, Total
4.
1-0:1.8.0
A+ all phases active Energy, Total, PV
5.
1-0:2.8.0
A- all phases active Energy, Total
6.
1-0:2.8.0
A- all phases active Energy, Total, PV
7.
1-0:3.8.0
Q+ all phases active Energy, Total
8.
1-0:3.8.0
Q+ all phases active Energy, Total, PV
9.
1-0:4.8.0
Q- all phases active Energy, Total
10.
1-0:4.8.0
Q- all phases active Energy, Total, PV
11.
1-0:1.6.0
A+ All phases Max.demand., Total
12.
1-0:1.6.0
A+ All phases Max.demand., Total, PV
13.
1-0:1.2.0
A+ All phases Comulative.demand., Total
14.
1-0:2.6.0
A- All phases Max.demand., Total
12-4
15.
1-0:2.6.0
A-All phases Max.demand, Total, PV
16.
1-0:2.2.0
A- All phases Comulative.demand, Total
17.
1-0:3.6.0
Q+ All phases Max.demand, Total
18.
1-0:3.6.0
Q+ All phases Max.demand, Total, PV
19.
1-0:3.2.0
Q+ All phases Comulative.demand, Total
20.
1-0:4.6.0
Q- All phases Max.demand, Total
21.
1-0:4.6.0
Q-All phases Max.demand, Total, PV
22.
1-0:4.2.0
Q- All phases Comulative.demand, Total
23.
1-0:0.1.0
MD reset count
24.
1-0:0.1.2
MD reset times
2.
Configure different control readings for data storage / data display.
The new age all in one energy meters are solid state or digital energy meters, whose
design is based on microprocessor. The one energy meter can measure / register/ record
almost 180 types of parameters including active energy, reactive energy, and apparent energy
in both the directions. Maximum demands, tariffs, grid conditions like voltages, currents,
power factor, and frequency.
That is, it is a multifunctional instrument. These energy meters are configured by a
software program for the required parameters. Meter memory can be segregated into
different registers (Energy Register and MW Register) to hold the requisite data. The
relevant data is termed as Energy Log and MW Log respectively. In some of the latest
digital energy meters another feature called as event log is incorporated which keeps the
log of major events, as supply cut-off, supply restored, meter cover opened etc.
Modern Solid state energy meters can perform the functions of more than 50 types
including calculation, handling and storing data to various registers, data display etc. these
include:
12-5
Grid Monitoring
Three Voltages Phase to Phase.
Three Voltages Phase to Line.
Three types of power ( Import) Active, Reactive, Apparent.
Three types of power ( Export) Active, Reactive, Apparent.
Frequency.
Power Factor.
Phase Angles.
Energy Measurements /Recording
Active Energy (Import).
A+
MWh
Active Energy (Export).
A-
MWh
Reactive Energy (Import).
Q+
MVARH
Reactive Energy (Export).
Q-
MVARH
Apparent Energy (Import).
S+
MVAH
Apparent Energy (Export).
S-
MVAH
Cumulative Energy Active (Import) MWh
Cumulative Energy Active (Export) MWh
Cumulative Energy Reactive (Import)
MVARH
Cumulative Energy Reactive (Export)
MVARH
Maximum Demands (MDI)
Current MDI ( Active Import)
Mw
Current MDI ( Active Export)
Mw
Current MDI ( Reactive Import)
Mw
Current MDI ( Reactive Export)
Mw
12-6
Billing MDI ( Active Import)
Mw
Billing MDI ( Active Export)
Mw
Billing MDI ( Reactive Import)
Mw
Billing MDI ( Reactive Export)
Mw
Tariff Wise Recording Of Energy / T.O.U (Time of Use) Metering
Tariff-1
Tariff-3
Tariff-5
Tariff-2
Tariff-4
Tariff-6
Event Logs
Events are recorded chronologically by the some of the digital energy meter like
terminal cover opening, missing any phase of voltage or current, supply cut-off and
restored, to safeguard against possible sorts of meter tempering.
3.
Configure for different communication protocols and media.
Digital energy meters are also programmed to configure to adopt different
communication, to display / transfer of data via different media including digital LCD
display, digital I / O, optical port and serial communication ports, RS-232 and or RS-485.
4.
Real time clock and calendar setting i.e. date and time setting.
The Brain of the digital energy meter is microprocessor which performs all the
calculations and these energy meters are configured by a software program for the required
parameters, data segregation and storage, communication protocol, real time clock and
calendar settings. Meter memory can be segregated into different registers (Energy Register
and MW Register) to hold the requisite data time wise.
12-7
The relevant data is termed as Energy Log and MW Log and event Log respectively.
To control the brain of the digital energy meter i.e. microprocessor, there is an other
vital part ( in hardware)
real time clock which acts like a heart to keep in pace the
calculations and other functions by the microprocessor.
Real time clock and calendar are programmed for configuration of the time and
calendar format.
For any sort of the digital energy meter, all the calculations, control functions, data
storage and retrieval, communication are in chronological order and all the operations with in
microprocessor are solely dependent upon the real time clock and battery back-up.
12-8